rtdcpl.exe is a Realtek AC97 Audio Control Panel
from Realtek Semiconductor Corp.
belonging to Realtek AC97 Audio Control Panel
Non-system processes like rtdcpl.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues.